ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
High-power optical multimode fibers are essential components for materials processingand surgery and can limit the reliability of expensive systems due to breakdown at the end faces.The breakdown threshold of fibers is determined by intrinsic materials properties and parameters ofthe technology applied. The aim of this paper is the identification of technological parameters thatare crucial for the fiber quality.Fibers were drawn from preforms of Heraeus SWU with core material F300 and a low amount ofOH-. Both, the cladding (fluorine doped SiO2) to core diameter ratio (CCDR) and the drawing speedwere varied. CCDR values between 1.05 and 1.4 were used. Afterwards, the laser-induced damagethresholds (LIDT) of the fibers were determined. For comparison, also samples from preforms,which underwent different thermal treatments above the transition temperature, were tested withrespect to their damage resistivity. Single and multi pulse LIDT measurements were done inaccordance with the relevant ISO standards. Nd:YAG laser pulses with durations of 15 ns (1064 nmwavelength) and 8.5 ns (532 nm) at a repetition rate of 10 Hz were utilized. For the fibers, LIDTvalues (1-on-1, 1064 nm and 532 nm) increased with growing CCDR and with decreasing drawingvelocities
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.39-40.225.pdf
Permalink
